﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace if_else
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("输入数字：");
           
            int num = Convert.ToInt32(Console.ReadLine());
            if (num > 80)
            {
                Console.WriteLine("恭喜，一等奖");
            }
            else if ((num>60)&&(num<70))
            {

                Console.WriteLine("恭喜，二等奖");
            }
            else if((num>=30)&&(num<=35)){
                Console.WriteLine("恭喜，三等奖");
            }
            else
            {
                Console.WriteLine("谢谢惠顾");
            }
        }
    }
}
